| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Romano Gianluca | EVP & CFO | SEAGATE TECHNOLOGY HOLDINGS PLC, 47488 KATO ROAD, FREMONT | /s/ Louis J. Thorson, Attorney-in-Fact for Gianluca Romano | 14 Nov 2025 | 0001764650 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STX | Ordinary Shares | Options Exercise | $468K | +5.36K | +9.28% | $87.34 | 63.1K | 12 Nov 2025 | Direct | F1 |
| transaction | STX | Ordinary Shares | Options Exercise | $703K | +10.2K | +16.18% | $68.83 | 73.4K | 12 Nov 2025 | Direct | |
| transaction | STX | Ordinary Shares | Options Exercise | $1.16M | +18.1K | +24.64% | $64.31 | 91.4K | 12 Nov 2025 | Direct | |
| transaction | STX | Ordinary Shares | Options Exercise | $1.91M | +18.9K | +20.63% | $101.34 | 110K | 12 Nov 2025 | Direct | |
| transaction | STX | Ordinary Shares | Sale | -$713K | -2.55K | -2.31% | $279.69 | 108K | 12 Nov 2025 | Direct | F2 |
| transaction | STX | Ordinary Shares | Sale | -$1.48M | -5.29K | -4.9% | $280.67 | 102K | 12 Nov 2025 | Direct | F3 |
| transaction | STX | Ordinary Shares | Sale | -$1.61M | -5.71K | -5.57% | $281.49 | 96.8K | 12 Nov 2025 | Direct | F4 |
| transaction | STX | Ordinary Shares | Sale | -$1.24M | -4.4K | -4.55% | $282.55 | 92.4K | 12 Nov 2025 | Direct | F5 |
| transaction | STX | Ordinary Shares | Sale | -$1.94M | -6.84K | -7.4% | $283.46 | 85.5K | 12 Nov 2025 | Direct | F6 |
| transaction | STX | Ordinary Shares | Sale | -$1.48M | -5.22K | -6.1% | $284.55 | 80.3K | 12 Nov 2025 | Direct | F7 |
| transaction | STX | Ordinary Shares | Sale | -$1.23M | -4.29K | -5.35% | $285.54 | 76K | 12 Nov 2025 | Direct | F8 |
| transaction | STX | Ordinary Shares | Sale | -$1.06M | -3.7K | -4.87% | $286.56 | 72.3K | 12 Nov 2025 | Direct | F9 |
| transaction | STX | Ordinary Shares | Sale | -$1.41M | -4.89K | -6.77% | $287.75 | 67.4K | 12 Nov 2025 | Direct | F10 |
| transaction | STX | Ordinary Shares | Sale | -$893K | -3.09K | -4.59% | $288.68 | 64.3K | 12 Nov 2025 | Direct | F11 |
| transaction | STX | Ordinary Shares | Sale | -$783K | -2.7K | -4.2% | $289.82 | 61.6K | 12 Nov 2025 | Direct | F12 |
| transaction | STX | Ordinary Shares | Sale | -$378K | -1.3K | -2.11% | $290.68 | 60.3K | 12 Nov 2025 | Direct | F13 |
| transaction | STX | Ordinary Shares | Sale | -$379K | -1.3K | -2.15% | $291.70 | 59K | 12 Nov 2025 | Direct | F14 |
| transaction | STX | Ordinary Shares | Sale | -$29.3K | -100 | -0.17% | $292.64 | 58.9K | 12 Nov 2025 | Direct | |
| transaction | STX | Ordinary Shares | Sale | -$206K | -700 | -1.19% | $294.00 | 58.2K | 12 Nov 2025 | Direct | F15 |
| transaction | STX | Ordinary Shares | Sale | -$442K | -1.5K | -2.58% | $294.90 | 56.7K | 12 Nov 2025 | Direct | F16 |
| transaction | STX | Ordinary Shares | Sale | -$130K | -439 | -0.77% | $296.09 | 56.3K | 12 Nov 2025 | Direct | F17 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STX | NQ Options | Options Exercise | $0 | -5.36K | -100% | $0.00 | 0 | 12 Nov 2025 | Ordinary Shares | 5.36K | $87.34 | Direct | F18 |
| transaction | STX | NQ Options | Options Exercise | $0 | -10.2K | -54.54% | $0.00 | 8.52K | 12 Nov 2025 | Ordinary Shares | 10.2K | $68.83 | Direct | F19 |
| transaction | STX | NQ Options | Options Exercise | $0 | -18.1K | -35.29% | $0.00 | 33.1K | 12 Nov 2025 | Ordinary Shares | 18.1K | $64.31 | Direct | F20 |
| transaction | STX | NQ Options | Options Exercise | $0 | -18.9K | -29.17% | $0.00 | 45.8K | 12 Nov 2025 | Ordinary Shares | 18.9K | $101.34 | Direct | F21 |
Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.
Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).
| Id | Content |
|---|---|
| F1 | All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 1, 2025. |
| F2 | These Ordinary Shares were sold in multiple trades at prices ranging from $279.06 to $280.04. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F3 | These Ordinary Shares were sold in multiple trades at prices ranging from $280.06 to $281.05. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F4 | These Ordinary Shares were sold in multiple trades at prices ranging from $281.06 to $282.04. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F5 | These Ordinary Shares were sold in multiple trades at prices ranging from $282.07 to $283.01. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F6 | These Ordinary Shares were sold in multiple trades at prices ranging from $283.07 to $284.06. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F7 | These Ordinary Shares were sold in multiple trades at prices ranging from $284.07 to $285.06. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F8 | These Ordinary Shares were sold in multiple trades at prices ranging from $285.07 to $286.06. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F9 | These Ordinary Shares were sold in multiple trades at prices ranging from $286.10 to $287.08. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F10 | These Ordinary Shares were sold in multiple trades at prices ranging from $287.15 to $288.10. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F11 | These Ordinary Shares were sold in multiple trades at prices ranging from $288.20 to $289.17. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F12 | These Ordinary Shares were sold in multiple trades at prices ranging from $289.20 to $290.14. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F13 | These Ordinary Shares were sold in multiple trades at prices ranging from $290.33 to $291.21. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F14 | These Ordinary Shares were sold in multiple trades at prices ranging from $291.40 to $292.24. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F15 | These Ordinary Shares were sold in multiple trades at prices ranging from $293.64 to $294.59. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F16 | These Ordinary Shares were sold in multiple trades at prices ranging from $294.66 to $295.64. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F17 | These Ordinary Shares were sold in multiple trades at prices ranging from $295.81 to $296.34. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| F18 | Options granted to the Reporting Person under the Seagate Technology plc 2022 Equity Incentive Plan (the "2022 Plan") are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 9, 2022 and the remaining options vested in equal monthly installments over the 36 months following September 9, 2022. |
| F19 | Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 9, 2023 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2023. |
| F20 | Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 11, 2024 and the remaining options vest in equal monthly installments over the 36 months following September 11, 2024. |
| F21 | Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 9, 2025 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2025. |